Фильтр динамического поиска в JTable

в каком классе? OpenData, откуда я читал из txt файла? есть table.setModel (new DefaultTableModel (col, 0)); линия там. Это тот, который нужно изменить?

Попробуйте что-то вроде этого:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;

public class RowSorterTest {
  private final String[] columnNames = {"Number", "Type", "IP", "Protocol", "Line"};
  private final Object[][] data = {
    {"aaa", "1", "", "", ""}, {"bbbbb", "", "", "", ""}
  };
  private final DefaultTableModel model = new DefaultTableModel(data, columnNames) {
    @Override public Class<?> getColumnClass(int column) {
      return getValueAt(0, column).getClass();
    }
  };
  private final JTable table = new JTable(model);
  private final TableRowSorter<TableModel> rowSorter = new TableRowSorter<>(model);
  private final JTextField searchFilter = new JTextField();
  private final JButton open = new JButton("open");

  public JComponent makeUI() {
    table.setRowSorter(rowSorter);
    open.addActionListener(new OpenData());//end OpenData class

    JPanel panel = new JPanel(new BorderLayout());
    panel.add(new JLabel("Search:"), BorderLayout.WEST);
    panel.add(searchFilter, BorderLayout.CENTER);
    panel.add(open, BorderLayout.EAST);

    searchFilter.getDocument().addDocumentListener(new DocumentListener() {
      @Override
      public void insertUpdate(DocumentEvent e) {
        String text = searchFilter.getText();
        System.out.println(text);
        if (text.trim().length() == 0) {
          rowSorter.setRowFilter(null);
        } else {
          rowSorter.setRowFilter(RowFilter.regexFilter("(?i)" + text));
        }
        table.repaint();
      }
      @Override
      public void removeUpdate(DocumentEvent e) {
        String text = searchFilter.getText();
        if (text.trim().length() == 0) {
          rowSorter.setRowFilter(null);
        } else {
          rowSorter.setRowFilter(RowFilter.regexFilter("(?i)" + text));
        }
      }
      @Override
      public void changedUpdate(DocumentEvent e) {
        //not needed: throw new UnsupportedOperationException("Not supported yet.");
      }
    });

    JPanel p = new JPanel(new BorderLayout());
    p.add(new JScrollPane(table));
    p.add(panel, BorderLayout.SOUTH);
    return p;
  }
  class OpenData implements ActionListener {
    @Override public void actionPerformed(ActionEvent e) {
//       String line = null;
//       try{
//           File file = new File ("C:\\Inne\\PhoneData.txt");
//           FileReader fr = new FileReader (file.getAbsoluteFile());
//           BufferedReader br = new BufferedReader (fr);
//           StringBuilder builder = new StringBuilder();
//           while ((line = br.readLine()) != null) {
//               builder.append(line);
//           }
//           String[] lineArray= builder.toString().split("/");
//           table.setModel(new DefaultTableModel(columnNames, 0));
//           for(String currentLine: lineArray){
//               String[] dataArray = currentLine.split(";");
//               ((DefaultTableModel)table.getModel()).addRow(dataArray);
//           }
//           br.close();
//       }catch (IOException e3) {
//           e3.printStackTrace();
//       }//end catch
      DefaultTableModel m = new DefaultTableModel(columnNames, 0);
      //Dummy data
      for (int i = 0; i < 5; i++) {
        String[] dataArray = {"aa" + i, "", "", "", ""};
        m.addRow(dataArray);
      }
      table.setModel(m);
      rowSorter.setModel(m);
    }//end action method
  }
  public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
      @Override public void run() {
        createAndShowGUI();
      }
    });
  }
  public static void createAndShowGUI() {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    f.getContentPane().add(new RowSorterTest().makeUI());
    f.setSize(320, 240);
    f.setLocationRelativeTo(null);
    f.setVisible(true);
  }
}